Web pages and controllers Odoo also provides a web development framework, which can be used to develop website features closely integrated with our backend apps. We will take our first steps toward this by creating a simple web page to display the list of active books in our library. It will respond to web requests at the http://my-server/library/books address, so /library/books is the URL endpoint we want to implement. We will just have a short taste of what web development with Odoo looks like. This topic is addressed in more depth in Chapter 13 , Creating Website Frontend Features . Web controllers are the components responsible for rendering web pages. Controllers are methods defined in an http.Controller class, and they are bound to URL endpoints. When that URL endpoint is accessed, the controller code executes, producing the HTML to be presented to...
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The business logic layer The business logic layer encodes the application's business rules, such as validations and automatic computations. We will add the logic for our button now. This is done with Python code, using the methods in the Python class that represent the model. Adding business logic Previously, we added a button to the Book Form section to check whether the ISBN is valid. Modern ISBNs have 13 digits, where the last one is a check digit computed from the first 12. There is little point getting into the details of the algorithm used, so here is a Python function that implements this validation. It should be added inside the class Book(...) object, before the name field: Copy @api.multi def _check_isbn(self): self.ensure_one() digits = [int(x) for x in self.isbn if x.isdigit()] if len(digits) == 13: ponderations = [1, 3] * 6 terms = [a * b for a, ...
The view layer The view layer describes the user interface. Views are defined using XML, which is used by the web client framework to generate data-aware HTML views. We have menu items that can activate actions that can render views. For example, the Users menu item processes an action also called Users , which in turn renders a series of views. There are several view types available, such as the list (sometimes called tree for historical reasons) and form views, and the filter options made available in the top-right search box are also defined by a particular type of view, the search view. The Odoo development guidelines state that the XML files defining the user interface should be placed inside a views/ subdirectory. Let's start creating the user interface for our to-do application. In the next sections, we will make gradual improvements and frequent module upgrades to make those changes available. You...